Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Pole changing Rheostat control Combination of cascade and pole changing Cascade control Pole changing Rheostat control Combination of cascade and pole changing Cascade control ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The specific energy consumption of a train depends on which of the following? Acceleration and retardation All of the listed here Distance covered Gradient Acceleration and retardation All of the listed here Distance covered Gradient ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The wheels of a train, engine as well as bogies, are slightly tapered to Increase friction Reduce friction Facilitate in taking turns Facilitate braking Increase friction Reduce friction Facilitate in taking turns Facilitate braking ANSWER DOWNLOAD EXAMIANS APP
Electric Traction For given maximum axle load tractive efforts of AC. locomotive will be None of the listed here Less than that of D.C. locomotive More than that of D.C. locomotive Equal to that of D.C. locomotive None of the listed here Less than that of D.C. locomotive More than that of D.C. locomotive Equal to that of D.C. locomotive ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Speed-time curve of main line service differs from those of urban and suburban services on following account All of the listed here It has longer coasting period Accelerating and braking periods are comparatively smaller It has longer free running period All of the listed here It has longer coasting period Accelerating and braking periods are comparatively smaller It has longer free running period ANSWER DOWNLOAD EXAMIANS APP
Electric Traction The speed of a locomotive is controlled by Applying brakes Regulating steam flow to engine Gear box Flywheel Applying brakes Regulating steam flow to engine Gear box Flywheel ANSWER DOWNLOAD EXAMIANS APP
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